Notidem - the opposite of "idem
Genuine LinkedIn replies in your own voice, via AI
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Paul Pessoa

Notidem - the opposite of "idem - Genuine LinkedIn replies in your own voice, via AI

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Most LinkedIn replies are "great post!" — meaningless and forgettable. Notidem helps you write specific, thoughtful comments and message replies in your own voice, based on your profile and the post context. You always review and send — it never posts on your behalf. Free, open-source, no account needed. Bring your own AI key.

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Paul Pessoa
Maker
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Hey Product Hunt! I'm Paul, a software engineer from Brazil, and I built Notidem solo as a side project. The idea came from a personal frustration: I'd read genuinely interesting posts on LinkedIn and want to add something meaningful to the conversation — but the friction of writing a thoughtful reply from scratch meant I'd often just scroll past. The result? A feed full of "great post!" and "totally agree" comments that add nothing. Notidem is my answer to that. It's a Chrome extension that reads the post (or message thread) in front of you, combines it with a short profile you write about yourself, and drafts a reply in your voice — specific, human, and relevant. You always edit and post it yourself. It never acts on your behalf. It's free, open-source (MIT), no account needed, and you bring your own AI key — so nothing touches my servers. Happy to answer any questions about how it works, the privacy model, or what's coming next. Thanks for checking it out!